Frost Dates for 30521 — Carnesville, Georgia

Half of springs at Commerce 4 NNW, GA see their last 32°F night by March 31; only one in ten is past it by March 12, and one in ten still has one after April 14. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 8 20%, and after April 14 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 97% of the 127 Georgia stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 6 in half of years, as early as October 23 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 13 days later, around November 19; in spring the one-in-ten date for 28°F is April 1, 13 days before the 32°F one. The freeze-free season lasts 222 days in a typical year, shorter than at 70% of the 127 Georgia stations; it reaches 247 days one year in ten and falls short of 200 one year in ten. On average 60 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 11 days longer, to about April 11, and return around October 27. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 77%.

July is the warmest month at Commerce 4 NNW, GA, averaging 89°F by day and 69°F at night; January is the coldest at 53°F and 31°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 47% of years.

Warmth for growing adds up to 4,819 growing degree days a year (base 50°F), fewer than at 80% of the 127 Georgia stations. 39% of them (1,860) have built up by the end of June, and July adds the most, 901. Precipitation totals 52.0 inches a year, most in December (5.0") and least in May (3.8"); May to September bring 40% of it.

The nearest other station, Alto 4 SE, GA, 14 miles northwest of Carnesville, has a last frost 4 days later (April 4), a first frost 2 days earlier (November 4), a season 6 days shorter.

Measurable snow is rare here: only 10 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Carnesville, GA, 3 miles away, so there is no typical first-snow date to plan around.

ZIP 30521 is 14 miles from Commerce 4 NNW, GA, which stands at 820 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 6 other ZIP codes share the station; its figures are presented in full for 30549 (Jefferson). The 2023 USDA Plant Hardiness Zone Map lists ZIP 30521 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.